Dai-13 Hokenshitsu (第13保健室, "The 13th School Infirmary") is a Japanese manga series written and illustrated by Takao Aoyagi [ja].

It was serialized in Shogakukan's shōnen manga magazine Monthly Shōnen Sunday from May 2014 to September 2016.

Written and illustrated by Takao Aoyagi [ja], Dai-13 Hokenshitsu was serialized in Shogakukan's shōnen manga magazine Monthly Shōnen Sunday from May 12, 2014,[2] to September 12, 2016.

[3] Shogakukan collected its chapters in four tankōbon volumes, released from November 12, 2014,[1] to October 12, 2016.

[4]